President Trump is facing a decision on whether to extend the ban on travelers from six majority-Muslim nations from entering the U.S. This week, acting Homeland Security Secretary Elaine Duke sent the White House her recommendations for "tough and tailored" security vetting, to replace the current ban, which expires Sunday.

Though the brunt of Hurricane Maria has left Puerto Rico, the island's water worries continue. On Friday afternoon, the National Weather Service reported that the Guajataca Dam in the northwest is "failing," causing flash flooding. Buses were trying to evacuate people from the area "as quickly as they can," the service said.

Iran unveiled a new ballistic missile Friday, showing off the weapon during a military parade in Tehran. "When it comes to defending our country, we will ask nobody for their permission," President Hassan Rouhani said.

Compounding Puerto Rico's devastation in the wake of Hurricane Maria is the fact that so much is still unknown. Because most of the island's cellphone sites are out of service and the power grid is down, it has been difficult or impossible to connect with the people who live there — whether from the mainland or from another part of the island.

Atlanta resident Silkia Babilonia, who lives in Atlanta, says that since the storm, she hasn't been able to reach friends and family on the island's west side.

John McCain on Friday imperiled Republicans' latest Affordable Care Act repeal and replace effort when he said he "cannot in good conscience" support the so-called Graham-Cassidy bill. But McCain did also say he could at some point support the substance of his fellow Republicans' proposal.

"I would consider supporting legislation similar to that offered by my friends Sens. [Lindsey] Graham and [Bill] Cassidy were it the product of extensive hearings, debate and amendment," McCain said. "But that has not been the case."

North Korea has suggested that it could test a hydrogen bomb in the Pacific, the latest in an escalating tit-for-tat between leader Kim Jong Un and President Trump.

If Pyongyang makes good on the threat, it would mean marrying the two most powerful weapons known to man: a fusion-type nuclear weapon and a ballistic missile.

"This could probably mean the strongest hydrogen bomb test over the Pacific Ocean," North Korean Foreign Minister Ri Yong Ho told reporters in New York on Thursday in response to a question about what action the regime might take against the U.S.

German Chancellor Angela Merkel and her Christian Democratic Union are poised to win Germany's national elections Sept. 24. But for the first time since the Second World War, Germany's Parliament, the Bundestag, also looks set to include an extreme right-wing party — the Alternative fuer Deutschland (Alternative for Germany) or AfD.

Since its founding in 2013, the party, led by economist Alice Weidel and former CDU politician Alexander Gauland, has been shaking up the German political landscape. It is currently represented in 13 of Germany's 16 state legislative bodies.

Iraqi Kurdish leaders plan to hold a controversial independence referendum on Monday. Kurds are expected to overwhelmingly vote in favor of separating from Iraq. The United States and other allies have warned them not to go ahead.

Here's what to know:

Who and where are the Kurds?

An estimated 30 million Kurds live in territory overlapping northern Iraq, Turkey, Iran and Syria. They are the fourth-biggest ethnic group in the region after Arabs, Persians and Turks.

Uber's license to operate in London expires in eight days — and London's transportation agency says it won't be renewed, citing a range of problems that make the company "not fit and proper to hold a private hire operator licence."

The issues raised by Transport for London include Uber's "approach to reporting serious criminal offences" and how it handles background checks.

Uber says it will appeal the decision. Transport for London had been considering granting Uber a five-year license. The company was first licensed in London in 2012.

Cattle pass a lot of gas, and the methane from their flatulence and especially, their belches, is an expanding burden on the planet. The greenhouse gas has a warming potential 25 times that of carbon dioxide.